"The Occurrence and Propagation of Sound" PPT download

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"The Occurrence and Propagation of Sound" PPT download

Part One: Learning Objectives

1. Know that sound is produced by the vibration of objects.

2. Know that the propagation of sound requires materials.

3. Know the speed of sound in air

PPT on the occurrence and spread of sound, part 2: sounds in life

In natural phenomena and daily life, everyone hears so many different types of sounds,

1. How is sound produced?

Move your hands

Can you make them sound?

1. Paper jitter

2. Extend the ruler slightly from the table and turn it

3. Speak and sound yourself

Feel common characteristics:

1. Paper is vibrating when it makes sound;

2. The ruler is vibrating when it makes sound;

3. The vocal cords vibrate when people speak.

Occurrence and propagation of sound PPT, Part 3: Conduct experiments and collect evidence:

experiment one:

We strike the tuning fork to make it sound, use a ping pong ball to get close to the sounding tuning fork to observe, and then put the sounding tuning fork into the water to observe the phenomenon.

Experiment 2:

We put some crushed paper scraps on the table, then hit the table hard to observe what happened.

get conclusion:

Sound is produced by the vibration of an object. When the vibration stops, the sound production also stops.

Sound source: The object that is making sound is called the sound source.

The occurrence and propagation of sound PPT, part 4 content: Summary:

1. Sound can be transmitted through all solid, liquid, gas and other substances as media. These substances as transmission media are often referred to as media for short.

2. Sound cannot be transmitted in a vacuum.

Occurrence and propagation of sound PPT, Part 5 content: Standard practice:

1Every object that is making sound is _____________.

2The sound must be relied on

3Normally, the speed of sound in air is ____________________.

4 Railway guerrillas put their ears against the tracks in order to hear the sound of distant trains more quickly. This is because ____________________.

5 Student A puts an ear to one end of a water pipe, and student B taps the pipe at the other end. Do you think student A may hear several tapping sounds? Why?

I heard it three times, namely solid water pipes, liquid water, and finally the surrounding air.

Keywords: Zhejiang Education Edition seventh grade science PPT courseware for the second volume free download, PPT download on the occurrence and spread of sound, .PPT format;

For more information about the "Occurrence and Propagation of Sound" PPT courseware, please click on the "Occurrence and Propagation of Sound" ppt tag.

"Occurrence and Propagation of Sound" PPT courseware:

The first part of the PPT courseware "Occurrence and Propagation of Sound": Experiment 1, a rubber band, a steel ruler, and a pen cover, try to make them make sounds. 1. When the rubber band and steel ruler stop vibrating, can you still Hear a sound? 2. Use two fingers to gently...

"The Occurrence and Propagation of Sound" PPT:

"Occurrence and Propagation of Sound" PPT Part 1: Production of Sound Experiment 1: Place two fingers lightly on the throat, and then make a sound. What did you notice? __________ Experiment 2: Pulling the Tightened Rubber Band Do you hear the sound? _________..

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Update Time: 2024-11-09

This template belongs to science courseware Zhejiang Education Edition Seventh Grade Science Volume 2 industry PPT template

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